Squeezing device for underground project

ABSTRACT

A squeezing device for an underground project, comprising a guide body, a vibration system, a lubricating system, a guide system, a cutting mechanism and a gate, wherein the vibration system is located on four walls of the guide body, the lubricating system is internally provided with a lubricating pipeline along the four walls of the guide body and communicates with a corresponding lubricating nozzle, the guide system is located on four walls at a front end of the guide body, and the cutting mechanism is located at a front end of an inner cavity of the guide body, and the gate is located in a functional bin.

TECHNOLOGY FIELD

This invention relates to squeezing devices for underground projects,belonging to the technical field of underground space development.

BACKGROUND TECHNOLOGY

At present, there are mainly two types of underground constructionmethods: open excavation and mining method. Open excavation includesopen-top excavation and covered excavation top-down method. Miningmethod includes shield method, foreign new Austrian tunneling method(NATM) and domestic shallow tunneling method. Mining method is widelyused in underground projects because it minimizes demolition, hasminimal ground environment interference, and does not require trafficinterruption. The current mining methods are generally calledtime-and-space effect construction methods. Time-and-space effects basedon theoretical calculations are reliable under normal conditions.However, due to variations in geology, limitation of survey/explorationdata, coincidence of surrounding accidents, and soil index variance inthe process of construction, these factors can form various risks forunderground construction accidents. At the same time, currently thereare various factors we cannot completely control by relying onsupporting structures to passively resist the complex deformation stressand loosening stress of soil.

SUMMARY OF INVENTION

Underground project squeezing devices of the invention are beyond thescope of time-and-space construction limitations. The devices of theinvention can effectively avoid the undesirable effects and risks causedby ground subsidence and deformation as a result of soil loss duringunderground space construction. Under the premise of no interruption tothe major urban traffic, methods of the invention have obvious safetyand technological advantages and resource saving effects in theconstruction of stereo crossover or underground space development underexisting buildings or urban underground complex pipe rack constructions.

Embodiments of the invention may be realized by adopting the followingtechnologies:

An underground project squeezing device of the invention may include aguide body, a vibration system, a lubrication system, a guidance system,a cutting structure, and a gate. The vibration system may be located onthe four inner walls of the guide body. The lubrication systemlubricates pipes located along the four inner walls of the guide bodyand connects with lubrication nozzles disposed at suitable locations.The guidance system may be located in the four inner walls on the frontend. The cutting structure located in the front end of inner cavity ofthe conductor, and the sluice is located in the inner side of upper andlower walls of the conductor.

The conductor includes squeezing cavity, shell walls and functionalchamber. The squeezing cavity is a trapezoid-shaped or cone-shapedhollow cavity with certain length, width and height, and the projectingarea of the front end of the squeezing cavity is less than the back end.The shell wall is a grid steel structure which is made of two layers ofpanels, and between which a reinforced board is added so as tostrengthen the thickness and strength of the shell.

The conductor includes front and back parts. The front part is thetrapezoid-shaped or cone-shaped squeezing cavity, and the back part isthe functional chamber connecting with the prestress concrete cavity.The functional chamber is a hollow rectangle steel structure withcertain length. The front part of the functional chamber is the same asthe outer size of the back end of the squeezing cavity, and the backpart is the same as the size of the front part of prestress concretecavity. The prestress concrete cavity is a hollow rectangle precastingconcrete part with certain wall thickness and section length, and extrasections can be connected to prolong the cavity. The interface of thefront end of the functional chamber and the back end of the squeezingcavity uses flexible sealing gasket, and is put into the sealing groovewhich is specially designed by avoiding the positions of bolt holes. Theflexible sealing gasket bulges a little above the top surface of thesealing groove, and the connecting point adopts bumpy paneling jointingmethod. The bulging surface of the flexible sealing gasket is fastenedto the top surface of the sealing groove when fastening the bolt so asto strengthen sealing effect, and it can also prevent water leakage incase that the flexible sealing gasket is damaged by powerful bearingstress. The joint datum of back end of the functional chamber and theprestress concrete cavity and the vertical plane and horizontal plane ofthe joint datum of the front and back prestress concrete cavity adoptflexible sealing gasket, and is inserted in the sealing groove ofvertical plane and horizontal plane of the prestress concrete cavity.Thus two-level sealing is realized on the jointing point.

The section size of the front end of function cavity is the same as thatof the back end of squeezing cavity, and the section size of the backend of function cavity is also the same as that of the prestressconcrete cavity. There is a shoulder along the perimeter of the shell onthe jointing point of the squeezing cavity and functional chamber, andthere are bolt holes along the surroundings of the shoulder andconnected by bolts. There is enough space for installing revolving door,axle socket of upper door, axle socket of lower door, principle disccutter base, subsidiary disc cutter base, power equipment andtransmission opponents in the functional chamber, which will play ajointing role.

The mentioned vibrating system includes gas source vibrator, air ductand vibrating sheet. There are rectangle or circular holes with certainareas in appropriate positions in the squeezing cavity and the fourwalls of the functional chamber. The edges inside the holes arestep-sized, and there are sealing gaskets on the surface of the steps.The vibrating sheets are pressed on the sealing gaskets and installed onthe steps inside the holes by bolts.

The outer surface is a little higher than the outer surface of the shellwalls after the vibrating sheet is installed. The gas source vibrator isinstalled in appropriate positions on the bottom of the vibrating sheet,which is connected with the other gas source vibrators along the airducts between the plates of the shell walls. There are checking holes onthe jointing parts of gas source vibrators and air ducts, which is usedfor installing and repairing the joints of air ducts and gas sourcevibrators. The checking holes adopt inner cover plates and are blockedby screwing hard with the inner walls of the shell through bolts andsealing gaskets. By pumping into high-pressure gas through the air duct,the vibrator's amplitude and exciting force on the vibrating sheet arespread to the sand sticking to the vibrating sheet, and reduce thefriction by destroying the conductor's electrostatic adsorption effectcaused by sand. The mentioned lubrication system includes lubricationpipes and lubrication nozzles. The main lubrication pipe is installed inappropriate positions between the two planes of the shell wall, and theouter end of which connects with lubricant pump, and is connected withthe subsidiary lubrication pipe along the extending direction of themain lubrication pipe. There are checking holes inside the shell wallson the lubrication nozzle for checking and connecting, and the structureand installing method of which are the same as the checking holes ofvibrating system.

There is at least one lubrication nozzle in appropriate positions in thefour inner walls of the squeezing cavity, the functional chamber and theprestressing concrete cavity. There is outer thread on lubricationnozzles, which could be screwed tightly with inner thread of the wallsof the shell and the walls of prestressing concrete cavity. The outletof the lubrication nozzle is fan-shaped, and the direction of which ison the contrary to the squeezing direction in case of being blocked. Thelubricant modulated according to the land conditions will be sprayedfrom the lubrication nozzle through lubrication pipes by mud pump, and athin layer of liquid separator is formed in the interface between thesand and walls of conductors, and therefore the giant lateral resistancebetween the sand and the shell will be reduced.

The mentioned guidance system includes guide plates, steering cylinders,shafts, jointing bases and oil pipes. There is at least one guide plateon each wall of the front end of the squeezing cavity, and there is aboss on the back end of the guide plate. There are grooves on the frontend of the squeezing cavity walls, and there are bearing holes in thecenter of grooves and bosses. The bosses should insert the grooves andthe shafts should insert the bearing holes, thus, the bosses of theguide plate will hinge together with the grooves of the squeezingcavity. There is a matching steering cylinder on appropriate positioninside the walls of the squeezing cavity, which is driven bytransporting hydraulic oil through oil pipes. The piston rod of thesteering cylinder hinges with the jointing base of the guide plate byshafts, and propels the guide plate to change in certain angles.

There is at least one jointing base in the shell of a guide plate, whichis used for hinging for the piston rod of the steering cylinder. Theguide plates on the left and right side are left-and-right steeringteam, and the guide plates on the upper and lower side is up-and-downsteering team. Each team hinges with related bearing holes of the pistonrods of steering cylinders. When the piston rod of the steering cylinderon the vertical side protrudes or withdraws, the counterpart will reactoppositely, which will drive the jointing base of the guide plate tomove synchronously. Thus the guide plate will rotate around the shaftthrough the bearing holes of the boss and the grooves, and there willoccur angle changes towards the left or right side. As the same, thepiston rod of the horizon steering cylinders protrudes or withdraws, thecounterpart will also withdraw or protrudes oppositely. The guide plateof the jointing base will be driven to rotate around the shaft incertain angles, thus the horizontal moving position of the squeezingcavity is adjusted in appropriate angles.

The mentioned cutting structure includes principle disc cutters,secondary disc cutters, hard rock hammers, principle transmissionshafts, secondary transmission shafts, transmission keys, power devicesand fixing frames. The principle disc cutter includes cutting blade,principle transmission shaft and power device. The principle disc cutteris circular, lying in the front end of the squeezing cavity. The frontend-face of the principle is a little behind of the front end-face ofthe guide plate. There is at least a principle disc cutter according tothe size of the cross section of the squeezing cavity. There are bladesat intervals with different angles on the front end-face of theprinciple disc cutter. The back end of the principle disc cutterconnects with power device on the back end by principle transmissionshaft, and the power device will drive the principle transmission shaft,thus the principle disc cutter will be driven and produce giant torque.The power device adopts hydraulic motors. There is at least a secondarydisc cutter on the hollow part between the principle disc cutter and theframe of the front end of the squeezing cavity. There are also blades atintervals with different angles on the front end-face of the secondarydisc cutter. The secondary disc cutter is sleeve-jointed with the keywayof the secondary transmission shaft connecting with the power device bythe transmission key. Through the secondary transmission shaft, thepower device passes the rolling torque to the transmission key fixed inthe center of the back end of the secondary disc cutter, thus thesecondary disc cutter is driven to rotate and cut the soil. There arevertical holes in the axis of secondary transmission shaft, and thereare horizontal thrusting cylinders along the vertical holes. The pistonrod of the horizontal thrusting cylinder is hinged by shafts with theback end of the secondary disc cutter. That the piston rod of thehorizontal thrusting cylinder protrudes or withdraws will drive thetransmission key connected with the secondary disc cutter to move alongthe keyway of the secondary transmission shaft, and axial displacementwill occur to the secondary disc cutter in certain distance. Thus, thepurpose of adjusting the distance and pressure of the secondary disccuter and the soil, and changing cutting volume and process will berealized. The function of the blades on the front ends of the principledisc cutter and the secondary disc cutter is to cut soil quickly withoutbeing wrapped, and the space between the blades will not be filled. Theprinciple transmission shaft and secondary transmission shaft are fixedby fixing frames set in the functional chamber. There are air drivenhammers in the space between the principle disc cutter and secondarycutter, the driving method of which is the same as that of the secondarydisc cutter. But the hammers use air cylinders as power rather than oilcylinders. Under common circumstance, the air driven hammer lies in therear and does not work. When there are stones or rock interlayers,high-pressure air could be input and the piston rod of the cylinderintrudes and pushes the air driven hammer forward ahead of the principledisc cutter and the secondary cutter, then the air driven hammer isstarted and breaks the rocks avoiding the embarrassing situation ofinterrupting squeezing.

the mentioned sluice includes revolving door, axle socket of upper door,axle socket of lower door, door shaft, two-way cylinder, upper-arctrack, lower-arc track, driving cylinder, piston rod connector ofdriving steering cylinder, rear flat globe, bearing hole, support axle,support axle socket, fixed pulley, axle, axle socket, steering wheel,bearing, steel cable, shack, pulley groove, knobs, multi-hole anchor andwedge valve.

The revolving door is a rectangle steel structure with certainthickness, which is made up of two door plates between which there is agrid reinforced plate. There is at least a revolving door in eachfunctional chamber. There is a circular door shaft, being fixed with therevolving door. The upper end of the shaft is installed in the axlesocket of upper door, and the lower end is installed in the axle socketof lower door, and the center of the axle sockets of upper door and thelower door corresponds exactly with each other.

There are two styles for the transmission of the revolving door: thefirst is to be driven by oil cylinders. The revolving door is driven bycylinders. There is an upper-arc track clockwise on the top of therevolving door by the side of door shaft, and there is a lower-arc trackanticlockwise at the bottom of the revolving door on the opposite side.The piston rod connector of the upper driving cylinder is embedded intothe upper-arc track, and the piston rod connector of the lower drivingcylinder is embedded into the lower-arc track, and a shaft is used forhinging.

The revolving door is driven by cylinders. There is an upper-arc trackclockwise on the top of the revolving door by the side of door shaft,and there is a lower-arc track anticlockwise at the bottom of therevolving door on the opposite side. The piston rod connector of theupper driving cylinder is embedded into the upper-arc track, and thepiston rod connector of the lower driving cylinder is embedded into thelower-arc track, and a shaft is used for hinging. The protrusion andretraction directions of the piston rod of the upper driving cylinderand the lower driving cylinder make relative motions. The upper drivingcylinder and the lower driving cylinder are installed on appropriatepositions in the inner walls of the conductor of upper-arc track (50)and lower-arc track. When the upper driving cylinder protrudes, itspiston rod connector will push the upper-arc track and drive therevolving door to revolve clockwise, and the lower driving cylinder willalso protrude and push the lower driving cylinder and drive therevolving door to revolve clockwise. As the upper driving cylinder andthe lower driving cylinder protrude at the same time on the upper andlower end of the revolving door, there will occur impelling force withthe door shaft as the fulcrum, which will drive the revolving door torevolve clockwise through the upper-arc track and lower-arc track, andopen the revolving door. On the contrary, when the upper drivingcylinder and the lower driving cylinder withdraw at the same time, therewill occur pulling force with the door shaft as the fulcrum, which willdrive the revolving door to revolve anticlockwise through the upper-arctrack and lower-arc track, and close the revolving door. The piston rodconnectors of the upper driving cylinder and the lower driving cylinderhinge in the upper-arc track and lower-arc track, the stressed point ofwhich correspond to the moving track of the revolving door whenrevolving. There are bearing holes in the center of the rear flat globeof the upper driving cylinder and the lower driving cylinder, which isfixed in the support axle socket in the functional chamber by thesupport axle penetrating through bearing holes. When the upper drivingcylinder and the lower driving cylinder intrude or withdraw, the rearend of the globe will revolve around the supporting shaft, matching withthe track movement of the upper-arc track and lower-arc track. Thus therevolving door will revolve around the axis of the axle socket of upperdoor and the axle socket of lower door being opened or closed.

The second style is the combination way of steel cable, pulley andcylinder. There are fixed pulleys on the corresponding sides of the doorshaft on the two ends of the revolving door, and the axle is installedvertically in the axle socket set on corresponding positions of the twoends of the revolving door. There are steering wheels on the fixedpulleys of each revolving door on the corresponding ends of therevolving door in the inner side of the functional chamber, the ends ofthe axle of which are installed in the axle sockets of the functionalchamber, and there are bearings in the axle sockets.

Being fixed in the pulley groove by a buckle, the steel cable extends tothe fixed pulley installed in the knobs of the piston rod of thebidirectional steering cylinder inside the functional chamber throughthe groove of corresponding fixed pulleys and steering wheels. Theposition elevation of the fixed pulleys installed on upper and lowerend-faces of the revolving door interlace with each other in case thatthe steel cables of the pulleys collide. The steel cables have beenfixed in the front end of multi-hole anchor with wedge valve (petal)before connecting with the piston rod of bidirectional steeringcylinder. There is one cable led from the multi-hole anchor connectingwith the fixed pulleys inside the knobs of the piston rod ofbidirectional steering cylinder. The fixed pulleys and steering wheelsare installed in the two sides of the steel cable, which will fix thesteel cable in the pulley groove to avoid the derailment of the steelcable.

When the revolving door needs to be closed, the lower end of thebidirectional cylinder A on one side of the functional chamber withdrawsand pull the steel cable connected with the knobs to move in thedirection of retraction. Thus, the steel cable fixed on the pulleys onthe upper end of the revolving door will be pulled and the revolvingdoor will be driven to revolve around the axis of the axle socket ofupper door and lower door. At the same time, the upper end of thebidirectional cylinder A protrudes and relaxes the steel cable that hasbeen tightened before. Besides, the corresponding bidirectional cylinderB moves oppositely, that is, the piston rod on the lower end of thebidirectional cylinder B releases the steel cable, while the piston rodon the upper end of the bidirectional cylinder tightens the steel cable.The steel cable fixed on the fixed pulley in the lower end of therevolving door is pulled and close the revolving door coordinating withthe bidirectional cylinder A. If the revolving door needs to be opened,the bidirectional cylinder in the functional chamber is operatedoppositely, and the revolving door will be opened.

The beneficial effect of the invention is as followed:

(1) The invention device is beyond the range of time-and-apaceconstruction method, the normal pressure stress occurred when squeezinginto the soil is contrary to the direction of the relaxing stress ofsurrounding soil. The stress is used to resist the soil relaxingpressure, which turns the construction progress of underground projectinto an invisible supporting progress. Compared with the presentconstruction method of supporting first and excavating then, the largepreventing measures and cost in the first period will be nearlycancelled, which will save cost and shorten construction period, andreduce the risks of surface subsidence, declination and collapsing ofbuildings.

(2) The invention is especially suitable for urban underground complexpipe racks with geological conditions of soft soil, underground vehiclepassages and BRIEF underground interchanges, which could be constructedwithout interruption.

DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a longitudinal section of a guide body.

FIG. 2 shows a cross-sectional view along A-A line in FIG. 1.

FIG. 3 shows a cross-sectional view along B-B line in FIG. 1.

FIG. shows a cross-sectional view along E-E line in FIG. 1.

FIG. 5 shows a sectional view of a secondary cutter in the retractedstate.

FIG. 6 shows a sectional view of a secondary cutter in the protrudedstate.

FIG. 7 shows a cross-sectional view along K-K line in FIG. 6.

FIG. 8 shows a schematic of a pneumatic impact hammer.

FIG. 9 shows an expanded view of a vibrating hole and inspectionwindows.

FIG. 10 shows a front view of a prestressed concrete chamber.

FIG. 11 shows a cross sectional view along C-C line in FIG. 1.

FIG. 12 shows a cross sectional view along D-D line in FIG. 1.

FIG. 13 shows a schematic of a two-level seal at the jointing point of aprestressed concrete chamber.

FIG. 14 shows a schematic of a connection of the rear end of the guidebody and the front end of a prestressed concrete chamber.

FIG. 15 shows an enlarged view of sealing grooves and an elastic seal.

FIG. 16 shows an expanded view of a piston rod of a steering cylinderconnected with a lug (double ear).

FIG. 17 shows a schematic of rotation by a lower driving cylinder on thebottom of the revolving door.

FIG. 18 shows a schematic of rotation by a upper driving cylinder on thetop of the revolving door.

FIG. 19 shows a schematic of a revolving door pulled by a steel cable.

FIG. 20 shows a sectional view of a revolving door along the J-J line inFIG. 11.

FIG. 21 shows a sectional view of a multi-hole anchor device.

FIG. 22 shows a sectional view of an axle/shaft socket.

FIG. 23 shows a sectional view of a connection of piston rod and acurved/arc track.

In the Figures: 1. Soil-Squeezing chamber; 2. Shell wall; 2′ inner shellwall; 3. Reinforced/reinforcement plate; 4. Functional chamber; 5.Prestress concrete chamber; 6. Fan-shaped outlet; 7. Shoulder; 8. Bolthole; 9. Bolt; 10. Revolving door; 11. Upper door axle socket/east; 12.Lower door axle socket/seat; 13. Fixing base for the main cutter; 14.Fixing base for the secondary cutter; 15. Gas-powered (air-powered)vibrator; 16. Air duct; 17. Vibrating plate; 18. Hole; 19. Step; 20.Elastic seal (or Sealing gasket); 21. pipe (tubing); 22. Air ductconnector; 23. inspection window; 24. Inner cover plate; 25. Principle(main) lubricant duct; 25′ secondary lubricant duct; 26. Lubricantnozzle; 27. Guide plate; 28. Steering cylinder; 28′ Piston rod ofsteering cylinder; 29. Shaft (or shaft pin); 30. Jointing base (orconnecting seat); 31. Boss; 32. Groove; 33. Hole (shaft hole); 34. Bumpypaneling jointing; 35. main cutter; 36. secondary cutter; 37. Impacthammer; 38. main drive (transmission) shaft; 39. secondary drive(transmission) shafts; 40. Transmission key; 41. Power unit; 42. Fixingframe; 43. Blade; 44. Horizontal thrust cylinder; 45. Piston rod ofhorizontal thrusting cylinder; 46. Air/gas cylinder; 47. Piston rod ofair cylinder; 48. Door shaft; 49. Bidirectional cylinder B; 49′ Pistonrod of bidirectional steering cylinder; 50. Upper arc (curved) track;51. Lower arc (curved) track; 52. Upper driving cylinder; 52′ lowerdriving cylinder; 53. piston rod connecting head; 54. a flattenedspherical body (a disk-like piece); 55. Bearing hole; 56. Support axle;57. Support axle socket; 58. Fixed pulley; 59. Axle; 60. Axle socket;61. Steering wheel; 62. Bearing; 63. Steel cable; 64. Shack; 65. Pulleygroove; 66. Knobs; 67. Multi-hole anchor device; 68. Wedge-shapedlocking petal (locking wedge).

DETAILED DESCRIPTION

Embodiments of the invention will be further illustrated in thefollowing sections with reference to the drawings.

An embodiment of the invention comprises a guide body, a vibrationsystem, a lubrication system, a guidance system, a cutting structure,and a gate/door. The vibration system is located on the four walls ofthe guide body. The lubrication system comprises lubrication pipesdisposed along the four inner walls of the guide body and connected withcorresponding nozzles. The guidance system is located in the frontsection of the four walls of the guide body. The cutting structure islocated in the front section of the inner chamber of the guide body. Thegate/door is located inside the guide body between the upper and lowerwalls.

As shown in FIGS. 1, 2, 5, 6, 7, 9, 10, 13, 14, and 15, the guide bodycomprises a soil-squeezing chamber 1, shell walls 2, a reinforcementpanel 3, and a functional chamber 4. The soil-squeezing chamber 1 isdesigned as a chamber, having a certain length, width, and height. Thesoil-squeezing chamber 1 can be trapezoidal or cylindrical incross-section shape with a smaller cross section area in the front thanthe cross-section area in the back. The shell wall 2 is constructed oftwo panels sandwiching the reinforcement panel 3 soldered therebetweento support each other, thereby forming a web of steel structure toincrease the thickness and strength of the shall body.

The guide body comprises two sections: the front section and the backsection. The front section comprises a cone-shaped soil-squeezingchamber 1. The back section comprises a functional chamber 4, which isconnected to a prestressed concrete chamber 5. The functional chamber 4is shaped as a hollow rectangular steel structure having a certainlength. The front end of the functional chamber 4 has the samecross-sectional dimensions as the rear end of the soil-squeezing chamber1. The rear end of the functional chamber 4 has the same cross-sectionaldimensions as those of the front end of the prestressed concrete chamber5. The prestressed concrete chamber 5 is a high-strength prestressedconcrete structure with a hollow rectangular interior and a certainthickness and section length.

The front end of functional chamber 4 is in sealed connection with therear end of the soil-squeezing chamber 1 via an elastic seal 20 set inthe sealing trough 20′, wherein the elastic seal 20 is configurated notto cover bolt holes 8. The elastic seal 20 protrudes slightly above thesealing trough 20′ to contact sealing grooves 34, which has unevensurfaces, on the opposite contact component. Bolts 9 are used to presselastic seal 20 tightly against the sealing trough 20′, wherein the topsof bolts 9 are flush with the top surface of the sealing trough 20′,thereby reinforcing the sealing effects and preventing the elastic seal20 from becoming leaky due to damages caused by strong compressionforce.

The connecting faces between the rear end of the functional chamber 4and the prestressed concrete chamber 5 and between the two neighboring(front and back) prestressed concrete chambers 5 use elastic seals 20embedded in the seal troughs 20′ located at the ends (along bothhorizontal sides and vertical sides) of the prestressed concretechambers 5 to achieve tight seals.

A shoulder 7 is provided along the peripheral of the connection facebetween the soil-squeezing chamber 1 and the functional chamber 4. Boltholes 8 are evenly provided along four sides of the shoulder 7 tofacilitate the use of bolts 9 for connection. Inside the functionalchamber 4, there is a chamber sufficiently large to accommodate arevolving door 10, upper door axle seat/socket 11, lower door axleseat/socket 12, a base/seat 13 for fixing the main cutter, a base/seat14 for fixing the secondary cutter, power equipment 41, and atransmission structure. At the same time, the chamber in the functionalchamber 4 plays a role in connecting the front and back components.

As shown in FIGS. 1, 2, 3, 4, 9, 10, 13, 14, and 15, the vibrationsystem comprises a air-powered vibrator 15, an air duct 16, and avibration plate 17. On each of the four walls of the soil-squeezingchamber 1 and the functional chamber 4, there is a hole/opening 18,which can be a rectangular or round and has a certain area. A step 19 ismade on the inner edge of each opening 18. A seal 20 is placed on thestep 19. A vibration plate 17 is pressed on the seal 20 and secured withbolts 9 on the step 19 in the opening 18. After installation, thesurface of the vibration plate 17 is slightly higher than the surface ofthe shell wall 2. air-powered vibrators 15 are arranged on the innerwall of the vibration plate 17 at proper locations using bolts 9. An airduct 16 is arranged between the two plates of the shell wall 2 andconnects with each air-powered vibrator 15. An inspection window 23 isprovided at the location of the air-powered vibrator 15 and theconnector 22. The inspection window may be used for installation andrepair of the air-powered vibrator 15 and the connector 22. Theinspection window 23 comprises an inner cover plate 24, which is securedwith bolts 9 and seal 20 on the inner shell wall 2′. The air duct 16delivers compressed air (or gas). The air-powered vibrator 15 makes thevibration plate 17 vibrate with a certain magnitude and vibration forcethat is transmitted to the soil in contact with the vibration plate 17,leading to desorption of soil from the guide body, thereby achievingreduction of side friction.

As shown in FIGS. 9, 10, 14, and 19, the lubrication system comprises amain lubricant duct 25, a secondary lubricant duct 25′, a lubricantnozzle 26, and a fan-shaped outlet 6. The main lubricant duct 25 isdisposed between two plates of the shell wall 2 at an appropriatelocation. The outer end of the main lubricant duct 25 is connected to alubricant pump, and the other end is connected with the secondarylubricant duct 25′. To facilitate inspection, repair, and installation,inspection windows 23 are provided around nozzles 26. The constructionof inspection windows 23 is as described for the inspection windows forthe vibration system.

At least one lubricant nozzle 26 is disposed at an appropriate locationon the four walls of each of the soil-squeezing body 1, the functionalchamber 4, and the prestressed concrete chamber 5. The nozzle 26 has anouter thread that is used to thread into inner thread on the walls ofthe shell wall 2 and the prestressed concrete chamber 5. The outlet ofthe nozzle 26 has a fan shape, the opening of which is in an oppositedirection as the direction of the soil-squeezing and advancement toprevent the soil from clogging the outlet. A lubricant is preparedaccording to the soil conditions and pumped, using a slurry pump,through the main lubricant duct 25 and the secondary lubricant duct 25′to the nozzle 26 to spray outwards, thereby a thin layer of liquid filmof lubricant is formed on the guide body outside wall that contacts thesoil, leading to reduction of friction between the shell and the soil.

As shown in FIG. 4, the guiding system comprises a guide plate 27, asteering canister 28, a shaft pin 29, a connecting seat 30, and atubing/pipe 21. At least one guide plate 27 is installed at the front ofeach wall of the four walls of the soil-squeezing body 1. The rear endof the guide plate 27 has a boss 31. The boss 31 and a groove 32 areprovided with a shaft hole 33 at the center thereof. The boss 31 isinserted into the groove 32 so that the shaft hole 33 is concentric, andthe shaft pin 29 is inserted into the shaft hole 33 in sections, so thatthe boss 31 of the guide plate 27 and the groove 32 of the squeezingcavity 1 are hingedly connected.

At least one steering cylinder 28 corresponding to each of the guideplates 27 is disposed in a position corresponding to the guide plate 27between the two plates of the soil-squeezing chamber 1. The steeringcylinder 28 is driven by hydraulic pressure delivered by the pipe 21.The steering cylinder piston rod 28′ front end is provided with a shafthole 33, at a position corresponding to the guide plate 27, and ishingedly connected, via a shaft pin 29, to a connecting seat 30 locatedin between the two plates of the soil-squeezing chamber 1. The steeringcylinder piston rod 28′ is extended or retracted to drive the guideplate 27 to rotate around the shaft pin 29, thereby changing an angle ofthe guide plate 27 within an appropriate range. Between two plates ofthe guide plates 27 is provided with at least one connecting seat 30 forhingedly connecting the steering cylinder piston rod 28′. The guideplates 27 corresponding to the left and right sides of the verticaldirection form a left-and-right steering group, and the horizontallyupper and lower corresponding guide plates 27 form an up-and-downsteering group. Each group is hingedly connected to the correspondingsteering cylinder piston rod 28′ shaft hole 33. When the vertical groupsteering cylinder piston rod 28′ is extended or retracted, thecorresponding horizontal steering cylinder piston rod 28′ is retractedor extended (i.e., in the opposite direction), which causes theconnecting seat 30 of the guide plate 27 to move synchronously to drivethe guide plate 27 to rotate, via the boss 31 and the groove 32, aroundthe shaft pin 29 in the corresponding direction (i.e., to change theangle to the left or right).

Similarly, the extension or contraction in the horizontal direction ofthe upward steering cylinder rod 28′, while with the correspondingdownward steering cylinder piston rod 28′ move in the opposite direction(i.e., retraction or extension), leading to movement of the connectionseat 30 that causes the guide plate 27 to rotate around the shaft pin 29to change the angle upward or downward, thereby achieving the adjustmentof the traveling direction of the soil-squeezing chamber 1 within anappropriate angle range.

As shown in FIGS. 1, 2, 3, 5, 6, 7, and 8, the cutting mechanismcomprises a main cutter 35 (or main cutter disc), a secondary cutter 36,a hard rock impact hammer 37, a main drive shaft 38, a secondary driveshaft 39, a transmission key 40, a power unit 41, and a fixed frame 42.The main cutter 35 includes blades 43, the main drive shaft 38, and thepower unit 41. The main cutter 35 has a circular shape and is located atthe front end of the soil-squeezing chamber 1. The front-end surface ofthe main cutter 35 is retracted by a slight distance from the front-endsurface of the guide plate 27. At least one main cutter 35 is installeddepending on the cross-sectional dimension of the soil-squeezing chamber1. The front-end surface of the main cutter 35 is equipped with blades43 having different angles intermittently arranged (spaced apart)thereon. The main cutter 35 is connected to the power unit 41 in therear via the main drive shaft 38. The power unit 41 drives the maindrive shaft 38 to drive the main cutter 35 to generate a large torque.The power unit 41 may be a hydraulic motor.

At least one secondary cutter 36 is disposed in the hollow part betweenthe main cutter 35 and the side frame at the front end of thesoil-squeezing chamber 1. The front-end surface of the secondary cutter36 is also provided with blades 43 having different anglesdiscontinuously (intermittently) arranged thereon. The secondary cutter36 is connected, via transmission key 40, with the secondarytransmission shaft 39 of the power unit 41. The power unit 41 passes therotation torque to the drive shaft 39, which in turn transmits thetorque to the drive key 40 fixed to the center portion of the secondarycutter 36, thereby driving the secondary cutter disc 36 to rotatesynchronously to perform cutting of the soil. The secondary drive shaft39 is provided with a longitudinal cavity, and a horizontal thrustcylinder 44 is mounted along the longitudinal cavity. The horizontalthrust cylinder piston rod 45 and the rear end of the secondary cutter36 are hingedly connected via a shaft pin 29. The horizontal thrustcylinder rod 45 extends or retracts to drive the transmission key 40,which is fixed to the secondary cutter 36, to move along the secondarytransmission shaft 39 key groove. The movement causes the secondarycutter head 36 to achieve axial displacement within a certain distance,thereby achieving the purpose of adjusting the distance and pressurebetween the secondary cutter 36 and the soil up front, and changing thecutting amount and cutting progress. The blades 43 provided on frontsurfaces of the main cutter 35 and the secondary cutter 36 mainlyfunction to rapidly cut the soil and are not easily wrapped by the soilor filled between the gaps of the blades 43 by the soil as to lose thecutting function.

The main drive shaft 38 and the secondary drive shaft 39 arerespectively connected to the power unit 41. The power unit 41 is fixedto a fixing frame 42 in the functional chamber 4 and has sufficientstrength to ensure its stability. At the tangential gap between the maincutter 35 and the secondary cutter 36, a pneumatic impact hammer 37 isalso provided, and the pneumatic impact hammer 37 is driven in the samemanner as the secondary cutter 36, but a gas/air cylinder 46 instead ofa fluid cylinder is used for the power. The pneumatic impact hammer 37is not involved in the work and is retracted under normal circumstances.When a rock or rock interlayer is encountered, a high-pressure gas isinput to extend the gas cylinder piston rod 47 to push the pneumaticimpact hammer 37 forward beyond the main cutter head 35 and thesecondary cutter 36 by a certain distance. Then, the pneumatic impacthammer 37 is operated to gradually smash the hard rock, to avoidembarrassing situation wherein the squeeze-in process is interrupted.

As shown in FIGS. 11, 12, 15, 16, 17, 18, 19, 20, 21, 22, and 23, thegate comprises a revolving door 10, an upper door shaft seat 11, a lowerdoor shaft seat 12, a door shaft 48, a bidirectional cylinder, an uppercurved (arc) track 50, a lower curved track 51, a driving cylinder, adriving steering cylinder piston rod connecting head 53, a tail flatspherical body 54, a support shaft hole 55, a support shaft 56, asupport shaft seat 57, a fixed pulley 58, a wheel axle 59, a wheel axleseat 60, a guide wheel 61, a bearing 62, a cable 63, a buckle 64, apulley groove 65, the ears 66, a multi-hole anchor 67, and wedge-shapedlocking flaps 68. The revolving door 10 is a rectangular steel structurewith a certain thickness, which comprises a mesh-shaped reinforcingplate 3 welded between two door plates.

At least one revolving door 10 is installed in each function chamber 4.A cylindrical door shaft 48 is fixed vertically at the center of therevolving door 10. The upper end of the door shaft 48 is disposed insidean upper door shaft seat/socket 11, and the lower end of the door shaft48 is installed in a lower door shaft seat/socket 12. The axial centerof the upper door shaft seat 11 and the lower door shaft seat 12 arelocated at the center of the door.

There are two ways to drive the revolving door 10 to open and close. Thefirst method is a hydraulic cylinder push type: an upper curved rail 50is provided with a clockwise trajectory on the side of the revolvingdoor 10 corresponding to the lower door shaft seat 12, and a lowercurved track 51 with a counterclockwise trajectory is provided at thebottom of the revolving door 10 on the other side corresponding to thetop curved track 50. The piston rod connecting head 53 of an upperdriving cylinder 52 is embedded in the upper curved track 50, and thepiston rod connecting head 53 of a lower driving cylinder 52′ isembedded in the lower curved track 51 by inserting a shaft pin 29 toform a hinged connection. The upper driving cylinder 52 and the lowerdriving cylinder 52′ have their piston rods protruding in oppositedirections, and the contraction directions are in the oppositedirections. The upper driving cylinder 52 and the lower drivingcylinders 52′ are respectively disposed at appropriate positionscorresponding to the guiding inner walls of the upper curved track 50and the lower curved track 51. When the upper driving cylinder 52extends, the piston rod connecting head 53 pushes the upper curved track50 and drives the revolving door 10 to rotate in the clockwisedirection, while the lower driving cylinder 52′ also synchronouslyextends and pushes the lower curved track 51 to drive the revolving door10 to also rotate in the clockwise direction. Because the upper drivingcylinder 52 and lower driving cylinder 52′ are disposed on the revolvingdoor 10 at corresponding locations at upper and lower portions,simultaneous extension of them produces a bilateral lever thrust actionwith the lower door shaft seat 12 as a fulcrum, thereby the rotary door10 is pushed to open by rotating in a clockwise direction along theupper curved track 50 and the lower curved track 51. Conversely, whenthe upper driving cylinder 52 and the lower driving cylinder 52′simultaneously contract, the bilateral lever pulling force is generatedto drive, with the door shaft seat 12 as a fulcrum, the upper curvedtrack 50 and the lower curved track 51 to pull the door 10 to rotate inthe counterclockwise direction to close. The upper driving cylinder 52and the lower driving cylinder 52′ have their piston rod connectingheads 53 hinged in the upper curved track 50 and the lower curved track51 such that their force exertion points, during rotation, always followthe arc-movement track of the rotation door 10. A support shaft hole 55is formed at the center of the flat spherical body 54 of the upper drivecylinder 52 and the lower drive cylinder 52′. A support shaft 56 isinserted through the support shaft hole 55 to position it in the supportshaft seat 57 at the corresponding position of the functional chamber 4.When the upper drive cylinder 52 and the lower driving cylinder 52′extend or contract, the rear end thereof can be rotated correspondinglyaround the supporting shaft 56 to cooperate with the trajectory movementof the upper curved rail 50 and the lower curved rail 51, therebyallowing the revolving door 10 to rotate freely around the axle of thedoor shaft seat 11 and the lower door shaft seat 12 when closing oropening.

As shown in FIGS. 11, 12, 16, 19, 20, 21, and 22, the second method isbased on a steel cable pulley and cylinder combined transmission mode: afixed pulley 58 is disposed at a corresponding position on the upper andlower end faces of the rotary door 10, and an axle 59 extends verticallyinto the axle seat 60 disposed at corresponding positions on both endsof the rotary door 10. A guide wheel 61 is provided on the inside ofeach of the upper and lower walls of the functional chamber 4 atlocations corresponding to the front and rear ends of the revolving door10 and corresponding to the locations of the pulleys 58 on the revolvingdoors 10. The ends of the axle 59 are inserted into the upper and loweraxle seats 60 in the functional chamber 4. A bearing 62 is disposed inthe axle seat 60. A cable 63 is fixed in the pulley groove 65 by abuckle 64 and is restrained by the corresponding pulley 58 and thepulley groove 65 of the guide wheel 61 to extend to the pulley 58 fixedbetween two ears 66 at two ends of the two-way steering cylinder piston49′ installed on the vertical side walls of the functional chamber 4.The cable is also locked securely using the buckles 64 to form an upperand lower associated drive mechanism. In order to prevent the pulleys 63from colliding with each other, the elevation positions of the fixedpulleys 58 on the upper and lower ends of the revolving door 10 arecorrespondingly staggered. The cable 63 is passed successively throughthe wedge-shaped locking petals 68 before being connected with thetwo-way steering cylinder piston rod 49″. The wedge-shaped lockingpetals 68 are locked at the front end of a multi-hole anchor 67. Thecable leads out from the rear end of the multi-hole anchor 67 to connectto the pulley 58 fixed between the two ears 66 on the two-way steeringcylinder piston rod 49″. The fixed pulley 58 and the guide wheel 61 arerespectively disposed on the corresponding two sides of the steel cable63, forming a restraint for holding the steel cable 63 in thecorresponding pulley groove 65, thereby effectively preventing theinterruption or failure caused by the cable 63 being derailed duringoperation.

As shown in FIGS. 11, 12, and 19, when the revolving door 10 needs to beclosed, the lower end of the bidirectional cylinder A 49 on one side ofthe functional compartment 4 is retracted to pull the cable 63, which isconnected to the lug 66, to move in the retraction direction, so thatthe cable 63 fixed to the upper end pulley 58 of the revolving door 10rotate the revolving door 10 in the moving direction around a centralaxis between the upper door shaft seat 11 and the lower door shaft seat12. At the same time, the upper end of the two-way cylinder A 49 isextended, and the originally tensioned steel wire 63 is synchronouslyrelaxed. Moreover, the corresponding two-way cylinder B 49′ alsosynchronously performs the opposite movements. That is, the upper end iscontracted to tighten the cable 63, and the lower end is extended by theloosening cable 63, thereby pulling the cable 63 on the pulley 58 fixedat the lower end of the revolving door 10 from the opposite direction.The cable 63 moves in cooperation with the two-way cylinder A 49 tosynchronously pull the revolving door 10 to close. When the revolvingdoor 10 needs to be opened, the bi-directional cylinders in the functionchamber 4 are operated in the opposite motions to open the revolvingdoor 10.

Of course, the above description shows preferred embodiments of theinvention and should not be regarded as limiting the scope of theinvention. Embodiments of the invention are not limited to the aboveexamples. One skilled in the art would realize that modifications orimprovements of these examples within the substance of the inventionwould still fall within the scope of the invention.

What is claimed is:
 1. A soil-squeezing device for underground project,comprising: conductor, vibration system, lubrication system, guidancesystem, cutting structure and sluice. The vibration system is located inthe four inner walls of the conductor. The lubrication system is locatedin the lubrication pipes along the four inner walls of the conductor andconnected with the lubrication nozzle in proper positions. The guidancesystem is located in the four inner walls on the front end. The cuttingstructure located in the front end of inner cavity of the conductor, andthe sluice is located in the function chamber of the conductor.
 2. Thesoil-squeezing device for underground project according to claim 1,wherein the mentioned conductor includes squeezing chamber (1), shellinteguments (2), reinforcing plate (3) and function chamber (4). Thesqueezing chamber (1) is a trapezoid-shaped or cone-shaped hollow cavitywith certain length, width and height, and the projecting area of thefront end of the squeezing chamber is less than the back end. The shellintegument (2) is a grid steel structure which is made of two layers ofpanels, and between which a reinforced board (3) is added so as tostrengthen the thickness and strength of the shell. The conductorincludes front and back parts. The front part is the trapezoid-shaped orcone-shaped squeezing chamber (1), and the back part is the functionchamber (4) connecting with the prestress concrete cavity (5). Thefunction chamber (4) is a hollow rectangle steel structure with certainlength. The front part of the function chamber (4) is the same as theouter size of the back end of the squeezing chamber, and the back partis the same as the size of the front part of prestress concrete cavity(5). The prestress concrete cavity (5) is a hollow rectangle prestressedconcrete part with certain wall thickness and section length, and extrasections can be connected to prolong the cavity. The interface of thefront end of the function chamber (4) and the back end of the squeezingchamber (1) uses flexible sealing gasket (20), and is put into thesealing groove (20′) which is specially designed by avoiding thepositions of bolt holes (8). The flexible sealing gasket (20) bulges alittle above the top surface of the sealing groove (20′), and theconnecting point adopts bumpy paneling jointing (34) method. The bulgingsurface of the flexible sealing gasket (20) is fastened to the topsurface of the sealing groove (20′) when fastening the bolt (9) so as tostrengthen sealing effect. The joint datum of back end of the functionchamber (4) and the prestress concrete cavity (5) and the vertical planeand horizontal plane of the joint datum of the front and back prestressconcrete cavity (5) adopt flexible sealing gasket (20), and is insertedin the sealing groove of vertical plane (20′) and horizontal plane (20′)of the prestress concrete cavity (5). Thus two-level sealing is realizedon the jointing point. There is a shoulder (7) along the perimeter ofthe shell on the jointing point of the squeezing chamber (1) andfunction chamber (4) and there are bolt holes (8) along the surroundingsof the shoulder and connected by bolts (9). There is enough space forinstalling revolving door (10), upper axle base of door (11), lower axlebase of door (12), big disc cutter base (13), small disc cutter base(14), power equipment (41) and transmission opponents in the functionchamber.(4)
 3. The soil-squeezing device for underground projectaccording to claim 1, wherein the mentioned vibrating system includesgas source vibrator (15), air duct (16) and sheet for vibration (17).There are rectangle or circular holes (18) with certain areas inappropriate positions in the squeezing chamber (1) and the four walls ofthe function chamber (4). The edges inside the holes (18) are steps(19), and there are sealing gaskets (20) on the surface of the steps(19). The sheet for vibrations (17) are pressed on the sealing gaskets(20) and installed on the steps (19) inside the holes (18) by bolts (9),the outer surface is a little higher than the outer surface of the shellinteguments (2) after the sheet for vibration (17) is installed. The gassource vibrator (15) is installed in appropriate positions on the bottomof the sheet for vibration (17) by bolts (9), which is connected withthe other gas source vibrators (15) along the air ducts (16) between theplates of the shell integuments (2). There are checking holes (23) onthe jointing parts of gas source vibrators (15) and air ducts (22),which is used for installing and repairing the joints of air ducts (22)and gas source vibrators (15). The checking windows(holes preserved forchecking) (23) adopt inner cover plates (24) and are blocked by screwinghard with the inner walls of the shell (2′) through bolts and sealinggaskets (20). By pumping into high-pressure gas through the air duct(16), the vibrator's amplitude and exciting force on the sheet forvibration (17) are spread to the sand sticking to the sheet forvibration (17), and reduce the friction by destroying the conductor'selectrostatic adsorption effect caused by sand.
 4. The soil-squeezingdevice for underground project according to claim 1, wherein thelubrication system includes lubrication pipes (25), lubrication nozzles(26) and fan-shaped exit (6). The principle lubrication pipe (25) isinstalled in appropriate positions between the two planes of the shellintegument (2), and the outer end of which connects with lubricant pump,and is connected with the principle lubrication pipe (25′) along theextending direction of the principle lubrication pipe (25) on theposition of the lubrication nozzle (26). There are checking holes (23)in the lubrication nozzle (26) for checking and connecting, and thestructure and installing method of which are the same as the checkingholes of vibrating system (23). There is at least one lubrication nozzle(26) in appropriate positions in the four inner walls of the squeezingchamber (1), the function chamber (4) and the prestressing concretecavity (5). There is outer thread on lubrication nozzles (26), whichcould be screwed tightly with inner thread of the walls of the shell (2)and the walls of prestressing concrete cavity (5). The outlet of thelubrication nozzle (26) is fan-shaped, and the direction of thefan-shaped exit (6) is on the contrary to the squeezing direction incase of being blocked. The lubricant modulated according to the landconditions will be sprayed from the lubrication nozzle (26) throughprinciple lubrication pipes (25) and subsidiary pipes (25′) by mud pump,and a thin layer of liquid separator is formed in the interface betweenthe sand and walls of conductors.
 5. The soil-squeezing device forunderground project according to claim 1, wherein the mentioned guidancesystem includes director plates (27), steering cylinders (28), shafts(29), connecting sockets (30) and oil pipes (21). There is at least onedirector plate (27) on each wall of the front end of the squeezingchamber (1), and there is a boss (31) on the back end of the directorplate (27). There are grooves (32) on the front end of the squeezingchamber (1) walls, and there are bearing holes in the center of groovesand bosses. The bosses should insert the grooves and the shafts shouldinsert the bearing holes, thus, the bosses of the director plate willhinge together with the grooves of the squeezing chamber. There is amatching steering cylinder on appropriate position inside the walls ofthe squeezing chamber, which is driven by transporting hydraulic oilthrough oil pipes. The piston rod of the steering cylinder hinges withthe connecting socket of the director plate by shafts, and propels thedirector plate to change in certain angles. There is at least oneconnecting socket (30) in the shell of a director plate (27), which isused for hinging for the piston rod (28′) of the steering cylinder, andis connected with at least one steering cylinder put on the appropriatepositions in the piston rod (28′) and the squeezing cabin (1). Thedirector plates (27) on the left and right side are left-and-rightsteering team, and the director plates on the upper and lower side isup-and-down steering team. Each team hinges with related bearing holes(33) of the piston rods of steering cylinders (28′). When the piston rodof the steering cylinder (28′) on the vertical side protrudes orwithdraws, the counterpart will react oppositely, which will drive theconnecting socket (30) of the director plate (27) to move synchronously.Thus the director plate (27) will rotate around the shaft (29) throughthe bearing holes (33) of the boss (31) and the grooves (32), and therewill occur angle changes towards the left or right side. As the same,the piston rod (28′) of the horizon steering cylinders protrudes orwithdraws, the counterpart (28′) will also withdraw or protrudesoppositely. The director plate (27) of the connecting socket (30) willbe driven to rotate around the shaft (29) in certain angles, thus thehorizontal moving position of the squeezing chamber (1) is adjusted inappropriate angles.
 6. The soil-squeezing device for underground projectaccording to claim 1, wherein the mentioned cutting structure includesbig disc cutters (35), small disc cutters (36), hard rock hammers (37),principle transmission shafts (38), secondary transmission shafts (39),transmission keys (40), power devices (41) and fixing frames (42). Thebig disc cutter (35) includes cutting blade (43), principle transmissionshaft (38) and power device (41). The big disc cutter (35) is circular,lying in the front end of the squeezing chamber (1). The front end-faceof the big disc cutter (35) is a little behind of the front end-face ofthe director plate (27). There is at least a big disc cutter (35)according to the size of the cross section of the squeezing chamber (1).There are blades (43) at intervals with different angles on the frontend-face of the big disc cutter (35). The back end of the big disccutter (35) connects with power device (41) on the back end by principletransmission shaft (38), and the power device (41) will drive theprinciple transmission shaft (38), thus the big disc cutter (35) will bedriven and produce giant torque. The power device (41) adopts hydraulicmotors. There is at least a small disc cutter (36) on the hollow partbetween the big disc cutter (35) and the frame of the front end of thesqueezing chamber (1). There are also blades (43) at intervals withdifferent angles on the front end-face of the small disc cutter (36).The small disc cutter (36) is sleeve-jointed with the keyway of thesecondary transmission shaft (39) connecting with the power device (41)by the transmission key (40). Through the secondary transmission shaft,the power device (41) passes the rolling torque to the transmission key(40) fixed in the center of the back end of the small disc cutter (36),thus the small disc cutter (36) is driven to rotate and cut the soil.There are vertical holes in the axis of secondary transmission shaft(39), and there are horizontal thrusting cylinders (44) along thevertical holes. The piston rod (45) of the horizontal thrusting cylinderis hinged by shafts (29) with the back end of the small disc cutter(36). That the piston rod (45) of the horizontal thrusting cylinderprotrudes or withdraws will drive the transmission key (40) connectedwith the small disc cutter (36) to move along the keyway of thesecondary transmission shaft (39), and axial displacement will occur tothe small disc cutter (36) in certain distance. Thus the purpose ofadjusting the distance and pressure of the small disc cutter (36) andthe soil ahead will be realized. The principle transmission shaft (38)and the secondary transmission shaft (39) are separately connected withthe power device (41), which is installed on the fixing frame (42) ofthe function chamber (4). There are air driven hammers (37) in the spacebetween the big disc cutter (35) and secondary cutter (36), the drivingmethod of which is the same as that of the small disc cutter (36). Butthe hammers use air cylinders (46) as power rather than oil cylinders.Under common circumstance, the air driven hammer (37) lies in the rearand does not work. When there are stones or rock interlayers,high-pressure air could be input and the piston rod (47) of the cylinderintrudes and pushes the air driven hammer (37) forward ahead of the bigdisc cutter (35) and the secondary cutter (36), then the air drivenhammer (37) is started and breaks the rocks avoiding the embarrassingsituation of interrupting squeezing.
 7. The soil-squeezing device forunderground project according to claim 1, wherein the mentioned sluiceincludes revolving door (10), axle base of upper door (11), axle base oflower door (12), door shaft (48), two-way cylinder, upper-arc rail (50),lower-arc rail (51), driving cylinder, piston rod connector of drivingsteering cylinder (53), rear flat globe (54), bearing hole (55), supportaxis (56), support shaft (57), standing pulley (58), axle (59), axlebase (60), guide wheel (61), bearing (62), steel cable (63), horn cheat(64), pulley groove (65), knobs (66), multi-hole anchorage device (67)and wedge valve (68). The revolving door (10) is a rectangle steelstructure (3) with certain thickness, which is made up of two doorplates between which there is a grid reinforcing plate. There is atleast a revolving door (10) in each function chamber (4). There is acircular door shaft (48), being fixed with the revolving door (10). Theupper end of the shaft (48) is installed in the axle base of upper door(11), and the lower end is installed in the axle base of lower door(12), and the center of the axle bases of upper door and the lower doorcorresponds exactly with each other.
 8. The soil-squeezing device forunderground project according to claim 7, wherein the revolving door(10) is driven by cylinders. There is an upper-arc rail (50) clockwiseon the top of the revolving door (10) by the side of door shaft (48),and there is a lower-arc rail anticlockwise (51) at the bottom of therevolving door on the opposite side. The piston rod connector of theworking cylinder A (52) is embedded into the upper-arc rail (50), andthe piston rod connector of the working cylinder B (52′) is embeddedinto the lower-arc rail (51), and a shaft (29) is used for hinging. Theprotrusion and withdrawing directions of the piston rod of the workingcylinder A (52) and the working cylinder B (52′) make relative motions.The working cylinder A (52) and the working cylinder B (52′) areinstalled on appropriate positions in the inner walls of the conductorof upper-arc rail (50) and lower-arc rail (51). When the workingcylinder A (52) protrudes, its piston rod connector (53) will push theupper-arc rail (50) and drive the revolving door (10) to revolveclockwise, and the working cylinder B (52′) will also protrude and pushthe working cylinder B (52′) and drive the revolving door (10) torevolve clockwise. As the working cylinder A (52) and the workingcylinder B (52′) protrude at the same time on the upper and lower end ofthe revolving door, there will occur impelling force with the door shaft(48) as the fulcrum, which will drive the revolving door to revolveclockwise through the upper-arc rail (50) and lower-arc rail, and openthe revolving door (10). On the contrary, when the working cylinder A(52) and the working cylinder B (52′) withdraw at the same time, therewill occur pulling force with the door shaft (48) as the fulcrum, whichwill drive the revolving door to revolve anticlockwise through theupper-arc rail (50) and lower-arc rail (51), and close the revolvingdoor (10). The piston rod connectors of the working cylinder A (52) andthe working cylinder B (52′) hinge in the upper-arc rail (50) andlower-arc rail (51), the stressed point of which correspond to themoving track of the revolving door (10) when revolving. There arebearing holes (55) in the center of the rear flat globe (54) of theworking cylinder A (52) and the working cylinder B (52′), which is fixedin the support shaft (57) in the function chamber (4) by the supportaxis (56) penetrating through bearing holes (55). When the workingcylinder A (52) and the working cylinder B (52′) intrude or withdraw,the rear end of the globe will revolve around the supporting shaft (56),matching with the track movement of the upper-arc rail (50) andlower-arc rail (51). Thus the revolving door (10) will revolve aroundthe axis of the axle base of upper door (11) and the axle base of lowerdoor (12) being opened or closed.
 9. The soil-squeezing device forunderground project according to claim 7, wherein the revolving door(10) adopts the transmission way of the combination of steel cable,pulley and cylinder. There are standing pulleys (58) on thecorresponding sides of the door shaft (48) on the two ends of therevolving door (10), and the axle (59) is installed vertically in theaxle base (60) set on corresponding positions of the two ends of therevolving door (10). There are guide wheels (61) on the standing pulleys(58) of each revolving door (10) on the corresponding ends of therevolving door (10) in the inner side of the function chamber (4), theends of the axle (59) of which are installed in the axle bases (60) ofthe function chamber (4), and there are bearings (62) in the axle bases(60), being fixed in the pulley groove (65) by the horn cheat (64), thesteel cable (63) extends to the standing pulley (58) installed in theknobs (66) of the piston rod of the bidirectional steering cylinderinside the function chamber (4) through the groove (65) of correspondingstanding pulleys (58) and guide wheels (61), the position elevation ofthe standing pulleys (58) installed on upper and lower end-faces of therevolving door (10) interlace with each other in case that the steelcables of the pulleys collide. The steel cables have been fixed in thefront end of multi-hole anchorage device (67) with wedge valve (68)before connecting with the piston rod (49′) of bidirectional steeringcylinder. There is one cable (63) led from the multi-hole anchoragedevice (67) connecting with the standing pulleys (58) inside the knobs(66) of the piston rod (49′) of bidirectional steering cylinder. Thestanding pulleys (58) and guide wheels are installed in the two sides ofthe steel cable (63), which will fix the steel cable (63) in the pulleygroove (65) to avoid the derailment of the steel cable (63).
 10. Thesoil-squeezing device for underground project according to claim 9,wherein when the revolving door (10) needs to be closed, the lower endof the bidirectional cylinder A (49) on one side of the function chamber(4) withdraws and pull the steel cable connected with the knobs (66) tomove in the direction of withdrawing. Thus the steel cable (63) fixed onthe standing pulleys (58) on the upper end of the revolving door (10)will be pulled and the revolving door (10) will be driven to revolvearound the axis of the axle base of upper door (11) and lower door. Atthe same time, the upper end of the bidirectional cylinder A (49)protrudes and relax the steel cable (63) that has been tightened before.Besides, the corresponding bidirectional cylinder B (49′) movesoppositely, that is, the piston rod (49′) on the lower end of thebidirectional cylinder B releases the steel cable (63), while the pistonrod (49′) on the upper end of the bidirectional cylinder tightens thesteel cable. The steel cable (63) fixed on the standing pulley (58) inthe lower end of the revolving door (10) is pulled and close therevolving door (10) coordinating with the bidirectional cylinder A(49).If the revolving door (10) needs to be opened, the bidirectionalcylinder in the function chamber (4) is operated oppositely, and therevolving door (10) will be opened.